Author: alc
Date: Sun Jan 18 18:26:52 2009
New Revision: 187400
URL: http://svn.freebsd.org/changeset/base/187400
Log:
MFC rev 179887
Enforce the mapping of kernel loadable modules in the uppermost 2GB of the
kernel virtual address space on amd64.
Modified:
stable/7/sys/ (props changed)
stable/7/sys/contrib/pf/ (props changed)
stable/7/sys/dev/ath/ath_hal/ (props changed)
stable/7/sys/dev/cxgb/ (props changed)
stable/7/sys/kern/link_elf_obj.c
Modified: stable/7/sys/kern/link_elf_obj.c
==============================================================================
--- stable/7/sys/kern/link_elf_obj.c Sun Jan 18 17:54:03 2009
(r187399)
+++ stable/7/sys/kern/link_elf_obj.c Sun Jan 18 18:26:52 2009
(r187400)
@@ -667,6 +667,13 @@ link_elf_load_file(linker_class_t cls, c
goto out;
}
ef->address = (caddr_t) vm_map_min(kernel_map);
+
+ /*
+ * In order to satisfy amd64's architectural requirements on the
+ * location of code and data in the kernel's address space, request a
+ * mapping that is above the kernel.
+ */
+ mapbase = KERNBASE;
error = vm_map_find(kernel_map, ef->object, 0, &mapbase,
round_page(mapsize), TRUE, VM_PROT_ALL, VM_PROT_ALL, FALSE);
if (error) {
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